After the unveiling of Apple Watch during the Sept. 9 iPhone launch event, Apple announced WatchKit for Apple Watch. This is a new development kit will allow developers to create interesting and exciting ways to use the Apple Watch hardware and software in their apps.
WatchKit allows integration for Actionable notifications, WatchKit apps, and Glances. During the keynote, Apple demonstrated Facebook and Twitter functionality with Apple Watch along with other apps with the ability to unlock a hotel door, get transit directions, post to Pinterest, find your car, change the temperature with a Honeywell thermostat, and use Nike fitness features. All of these features and functionality will exist within individual Apple Watch apps.